clue/graph — pull request #2 by clemens-tolboom (2013-02-21 17:50:01+00:00)
Title: A __toString() PR

It would be great to have a __toString() at hand.

I failed to get the edges into the output. I tried
```php
$dest = $vertex->getVerticesId();
$result[] = $vertex->getId() . '(' . join(',', $dest) . ')';
```
and some other :(